Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 75 insertions, 0 deletions

diff --git a/include/hw/nubus/nubus.h b/include/hw/nubus/nubus.h
new file mode 100644
index 000000000..b3b4d2ead
--- /dev/null
+++ b/include/hw/nubus/nubus.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2013-2018 Laurent Vivier <laurent@vivier.eu>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef HW_NUBUS_NUBUS_H
+#define HW_NUBUS_NUBUS_H
+
+#include "hw/qdev-properties.h"
+#include "hw/sysbus.h"
+#include "exec/address-spaces.h"
+#include "qom/object.h"
+#include "qemu/units.h"
+
+#define NUBUS_SUPER_SLOT_SIZE 0x10000000U
+#define NUBUS_SUPER_SLOT_NB   0xe
+
+#define NUBUS_SLOT_BASE       (NUBUS_SUPER_SLOT_SIZE * \
+                               (NUBUS_SUPER_SLOT_NB + 1))
+
+#define NUBUS_SLOT_SIZE       0x01000000
+#define NUBUS_FIRST_SLOT      0x0
+#define NUBUS_LAST_SLOT       0xf
+#define NUBUS_SLOT_NB         (NUBUS_LAST_SLOT - NUBUS_FIRST_SLOT + 1)
+
+#define NUBUS_IRQS            16
+
+#define TYPE_NUBUS_DEVICE "nubus-device"
+OBJECT_DECLARE_SIMPLE_TYPE(NubusDevice, NUBUS_DEVICE)
+
+#define TYPE_NUBUS_BUS "nubus-bus"
+OBJECT_DECLARE_SIMPLE_TYPE(NubusBus, NUBUS_BUS)
+
+#define TYPE_NUBUS_BRIDGE "nubus-bridge"
+OBJECT_DECLARE_SIMPLE_TYPE(NubusBridge, NUBUS_BRIDGE);
+
+struct NubusBus {
+    BusState qbus;
+
+    AddressSpace nubus_as;
+    MemoryRegion nubus_mr;
+
+    MemoryRegion super_slot_io;
+    MemoryRegion slot_io;
+
+    uint16_t slot_available_mask;
+
+    qemu_irq irqs[NUBUS_IRQS];
+};
+
+#define NUBUS_DECL_ROM_MAX_SIZE    (128 * KiB)
+
+struct NubusDevice {
+    DeviceState qdev;
+
+    int32_t slot;
+    MemoryRegion super_slot_mem;
+    MemoryRegion slot_mem;
+
+    char *romfile;
+    MemoryRegion decl_rom;
+};
+
+void nubus_set_irq(NubusDevice *nd, int level);
+
+struct NubusBridge {
+    SysBusDevice parent_obj;
+
+    NubusBus bus;
+};
+
+#endif